44 
Cruise Report, RV ATAIR, Cruise 0671013-1, Bremerhaven - Skagen - Aberdeen, 19 Jul - 11 Aug 2022 
SS 
Blanking Distance [m] 
Maximum Range [m] 
Transducer Depth [m] 
Transducer Angle [°] 
3 
400 
5 
„16° 
Table. 7.2. Specification of the vessel-mounted Acoustic Doppler Current Profiler (VMADCP) in use 
during cruise 0671013-1. 
During the cruise the VMADCP was operated in broad-band mode in shallow regions to max- 
imise data quality. It was switched to narrow-band mode when in deeper waters to provide 
maximum vertical coverage. Furthermore, restrictions issued by the Danish authorities re- 
quired the use of the narrow-band mode when in Danish waters. Bin sizes were kept constant 
throughout the cruise to maintain consistency. Depending on the particular survey region, the 
bottom search threshold was adjusted several times. Detailed parameter settings are listed in 
Table 7.3. The obtained raw data obtained were processed using the VMADCP-toolbox OSS/ 
for Matlab, version 1.9, ofthe GEOMAR Helmholtz Centre for Ocean Research Kiel in Germany. 
The general settings and procedures follow the recommendations presented by Firing and 
Hummon (2010). 
The data processing yielded datasets of zonal and meridional current velocities distributed 
across latitude, longitude, time and depth along the ship’s track. The processed data were 
stored in several output files in the native MATLAB format (*.mat) at a temporal resolution of 1 
minute. Erroneous signals caused by signal reflection at the sea floor were removed in the 
resulting data files. 
Data recording began on 19 July 2022 at 13:16 UTC, following the departure from the initial 
STD station. Recording was stopped for the first time on 21 July 2022 at 01:22 UTC, prior to 
entering the Netherlands’ EEZ, due to a missing research permission for these waters. Re- 
zording restarted on 21 July at 10:31 UTC and continued until 24 July 2022 at 03:50 UTC, 
while operating in the British EEZ. Data recording was restarted on 24 July 2022 at 20:56 UTC 
upon entering the German EEZ. The VMADCP mode was switched to narrow-band mode prior 
to entering the Danish EEZ on 25 July 2022 at 07:37 UTC. Recording stopped on 31 July 2022 
at 13:24 UTC, prior to crossing the Danish 12 nm limit and subsequently entering the port of 
Skagen in Denmark. 
After leaving Skagen, VMADCP data collection resumed on 2 August 2022 at 11:50 UTC after 
crossing the 12 nm limit of Denmark, continuing until the vessel reached the 12 nm boundary 
of Sweden 18:10 UTC. Restrictions issued by the Swedish authorities required all underway 
measurement systems and respective data logging to be switched off while operating within 
Swedish territorial waters. Furthermore, the vessel was required to approach the two intended 
stations, GN805 and GN806, which were located within the territorial waters, via the shortest